Home / 39,189.69-54,082.16-21,285.05

Finding the Fourth Proportional to 39,189.69, 54,082.16 and 21,285.05

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Solution

The fourth proportional to 39,189.69, 54,082.16 and 21,285.05 is: 29,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,189.69 : 54,082.16 = 21,285.05 : x
  2. Step 2: Convert to fraction form
    39,189.69/54,082.16 = 21,285.05/x
  3. Step 3: Cross multiply
    39,189.69x = 54,082.16 × 21,285.05
  4. Step 4: Simplify right side
    39,189.69x = 1,151,141,262.51
  5. Step 5: Solve for x
    x = 1,151,141,262.51/39,189.69
  6. Step 6: Final answer
    x = 29,373.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.